Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Alcoa (AA) downgraded to Neutral from Buy at Citi with analyst Alexander Hacking saying the stock is up 60% year-over-year. 2. Dynagas LNG (DLNG) downgraded to Underperform from Market Perform at Wells Fargo with analyst Michael Webber saying another distribution cut is possible given expensive dropdowns from the company's private sponsor. 3. Skyworks (SWKS) downgraded to Neutral from Buy at Mizuho with analyst Vijay Rakesh saying the effects of a maturing handset cycle could start to impact the RF suppliers. 4. Prothena (PRTA) downgraded to Neutral from Buy at BTIG and to Perform from Outperform at Oppenheimer. 5. Donegal Group (DGICA) downgraded to Neutral from Outperform at Boenning & Scattergood. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.